Influence of the template on the properties of SAPO-31 and performance of Pd-loaded catalysts for n-paraffin isomerization

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• 作者：Jie Yang^a ; O.V. Kikhtyanin^b ; Wei Wu^a ; ^{wuwei@hlju.edu.cn} ; Yajing Zhou^a ; A.V. Toktarev^b ; G.V. Echevsky^b ; Rui Zhang^a
• 关键词：SAPO-31 ; Hydroisomerization ; n-Decane ; Acidity ; Selectivity
• 刊名：Microporous and Mesoporous Materials
• 出版年：2012
• 出版时间：1 March, 2012
• 年：2012
• 卷：150
• 期：Complete
• 页码：14-24
• 全文大小：1078 K

文摘

The SAPO-31 silicoaluminophosphates were synthesized by using different di-alkylamines and their properties were characterized by XRD, SEM and N₂ adsorption. NH₃-TPD, IR spectroscopy of adsorbed pyridine and ²⁹Si MAS NMR showed that these molecular sieves differed in their acidity both in the number of acid sites and in their strength. The catalytic properties of Pd/SAPO-31 samples were compared in n-decane conversion. It was found that their activity was related to the acidity of SAPO-31, but the isomerization selectivity was defined by the structural characteristics of the microporous material with minor influence of the other physico-chemical properties studied.